54.1% is the change from 525 to 809
Calculation steps:
[( 809 - 525 ) ÷ 525] x 100 = 54.1%
Formula
Percentage change = [(809 - 525) / 525] x 100
Subtract the new number by the original number
809 - 525 = 284
284 ÷ 525 = 0.540952380952381
0.540952380952381 x 100 = 54.1%